IT’S A DATING CLUE
Serial systems overlap, parts can be swapped, and some makers reused or changed formats.
SKYLIGHT REFERENCE DESK
SERIAL NUMBER
DECODER
Pick the maker, enter the serial number, and we’ll decode the published numbering pattern when we can.
DATES ONLY. NO VALUES. NO APPRAISALS.
READY
ENTER A SERIAL NUMBER
The decoder will give you the likely production date or range and tell you when the serial alone isn’t enough.
CROSS-CHECK IT
Neck dates, pot codes, pickup stamps, labels, hardware and construction details can tighten the date.
NO VALUE ESTIMATES
This tool identifies likely dates only. It does not estimate market value, authenticity or condition.
SUPPORTED RIGHT NOW
Fender: common U.S. vintage ranges and modern U.S. prefixes. Martin: published standard guitar/ukulele sequence through 2025. Taylor: 1993–present date-coded formats.
More makers can be added as their numbering systems are verified.